.Puzzle-squares {
  display: inline-grid;
  box-shadow: 0 4px 4px rgba(0, 0, 0, 0.3);
  grid-template-columns: 72px 72px 72px;
  grid-template-rows: 72px 72px 72px;
  grid-gap: 0;
  border-style: solid;
  border-width: 16px;
  border-radius: 8px;
  border-color: #a0822c;
  background-color: #c7c7c7;
}

.Puzzle-square {
  display: flex;
  font-size: 24pt;
  border: 1px solid black;
  border-radius: 0;
  background-color: blue;
  color: white;
  box-shadow: inset 0 -2px 6px rgba(0, 0, 0, 0.2);
  justify-content: center;
  align-items: center;
  cursor: pointer;
  user-select: none;
}

.Puzzle-square:active {
  box-shadow: inset 0 0 8px rgba(0, 0, 0, 0.2);
}

.Puzzle-square-empty,
.Puzzle-square-empty:active {
  border: none;
  background-color: inherit;
  box-shadow: inset 0 4px 8px rgba(0, 0, 0, 0.6);
  cursor: auto;
}

.Puzzle-complete {
  color: red;
  font-size: 20pt;
  margin-top: 16px;
}

.Puzzle-controls {
  display: block;
}

.Puzzle button {
  margin: 16px;
  padding: 6px 16px;
  font-size: 0.875rem;
  min-width: 64px;
  box-sizing: border-box;
  box-shadow: 0 3px 1px -2px rgba(0, 0, 0, 0.2), 0 2px 2px 0 rgba(0, 0, 0, 0.14),
    0 1px 5px 0 rgba(0, 0, 0, 0.12);
  font-family: "Roboto", "Helvetica", "Arial", sans-serif;
  font-weight: 500;
  line-height: 1.75;
  border-radius: 4px;
  letter-spacing: 0.02857em;
  text-transform: uppercase;
  border: 0;
  cursor: pointer;
  outline: 0;
  position: relative;
  align-items: center;
  vertical-align: middle;
  -moz-appearance: none;
  justify-content: center;
  text-decoration: none;
  -moz-user-select: none;
  -webkit-appearance: none;
}

button.Puzzle-shuffle {
  background-color: #d20019;
  color: white;
}

button.Puzzle-reset {
  background-color: #00cd00;
  color: white;
}

.Puzzle button:active {
  box-shadow: none;
}
